Improvement in self-locking window-hinges



UNITED STATES PATENT OFFICEo J. R. MURPHY, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO ALEXANDER SPEER, OF SAME PLAGE.

4IMPRVEMENT IN SELF-LOCKING WINDOW-HINGES.

Specication forming part of Letters Patent No. 40,145, dated September 29, 1863.

To all whom it may concern Be it known that I, J. R. MURPHY, of Pittsburg, in the county ot' Allegheny and State ot' Pennsylvania, have invented certain new and useful improvements in the construction of self-locking hinges i'or window-shutters and other purposes; and I do hereby declare the following to be afull, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in which- Figure 1 represents a horizontal section through a window-shutter and frame, showing a hinge in top plan constructed at'ter my plan, andthe shutter as locked open or back by said hinge. Fig. 2 represents a similar horizontal section and top plan with the shutter, however, swung shut or closed in the frame.

Silnilar letters of reference where they oocur in the separate figures denote like parts in both.

Many devices have been used in connection with shutter-hinges to hold the shutter when swung open or back; but these devices have been made separate from or in addition to the hinge itself, which ordinarily consists of but two pieces.

My invention consists in so forming the pivot or pin upon one halt" or part of the hinge, and the box or bearing upon the other halt' or part of the hinge as that the two pants, in addition to their forming the appliances for the swinging or turning of one part of the hinge upon the other part also form a locking` mechanism by which the shutter or door is held back when swung open.

To enable others skilled in the art to make and use my invention, I will proceed to describe the same with reference to the drawings.

The pivot-pin a, upon which the hub portion b of the hinge turns, has a portion of it, as at c, out away, so as to form a shoulder, t'. The

opening d in the hub of the hinge is of a cam or eccentric form, and has a shoulder upon it, as at e, which shoulder e, when the shutterA is swungback, as shown in Fig. 1,locks against the shoulder t' of the pivot-pin a, and thus holds the shutter back. To release and close the shutter it is only necessary, with the hand or otherwise, to push the bottom ot' the shutter A in the direction of the red arrow, Fig. 1, until the shoulders i c have passed by each other, and, by drawing upon the cord j' or upon the shutter itself, it will swing shut, and when shut, the pin and hub and their shoulders will be in the position shown in Fig. 2. The shape of thc opening in the hub ofthe hinge admits of the lateral motion of the shutter upon the pin to lock and unlock the two parts of the hinge. The locking is self-acting, as it is only necessary to swing open the shutter and the two shoulders will interlock with each other.A To draw to or close the shutter, aslight manipulation is necessary, as .has been above stated. Thus, without adding to the first cost ot a hinge, I cause it, in addition to its ordinary function asa hinge, to form a catch or lock to hold back the shutter, door, or other thing swung to or upon it.

B is an ordinary inside catch to hold the shutter when closed.

Having thus fully described my invention, what I claim therein as new, and desire to sccure by Letters Patent, is-

In combination with thetwo parts ofa hinge, the shoulder t' upon the pivot-pin, and the cam-shaped or eccentric opening and the shoulder formed in the wall thereof', for the purpose of locking a shutter or door back and at the same time concealing the locking mechanism, substantially as described.

J. R. MURPHY.

Witnesses:

J. DONALDSON, v W. W. SPEER. 

